The results suggest fast-food customers are willing to splurge for higher-priced items, a promising sign after chains used low prices to lure traffic. It also helps ease Burger King's strained relations with its franchisees, who want to sell more profitable products.

The chain had scheduled national ads featuring a pig with wings convincing a skeptic that a fast-food chain can cook up a mean rib, which were to run from May 24 through June 20. Burger King now plans to shuffle its advertisements over the next week to feature a different product so it's not broadcasting an out-of-stock product.

The company recently sold its 10 millionth rib. Have you tried them?

About the author

Daryl Paranada is the associate web producer for Marketplace overseeing all daily website content and production, as well as producing multimedia features -- including the popular economic explainer series Whiteboard -- and special projects. Follow him on Twitter @darylparanada.